Notification of string changes

Author: Tim Hunt
MDL-26567 no grade category option on the quiz settings form.
Also, refine the standard_grading_coursemodule_elements method to add a
help string.

AMOS BEGIN
CPY [gradecategory,grades],[gradecategoryonmodform,grades]
AMOS END


http://git.moodle.org/gw?p=moodle.git;a=commit;h=b9bed2172282771e8049650b3e53fc32ebd25421
http://github.com/moodle/moodle/commit/b9bed2172282771e8049650b3e53fc32ebd25421

+ 2.0 en [gradecategoryonmodform,core_grades]
+ 2.0 en [gradecategoryonmodform_help,core_grades]
- 2.0 en [gradecategoryhelp,core_grades]